Warp stop motion knockoff device



Aug. 15, 1944. J STUER 2,355,609

v WARP STOP MOTION KNOCK OFF DEVICE Filed .Nov. 23, 1941 Patented Aug. 15, 1944 WARP STOR MOTION KNOCKOFF DEVICE 7 Joseph Stuer, Lawrence, Mass.

Application November 28, 1941, Serial No. 420,822

6 Claims.

This invention relates to looms. Its purpose is to simplify and strengthen part of the mechanism between the shipper mechanism and the drop wires or other devices which feel the warp threads and when a thread breaks initiate motion which results in the stopping of the loom. This action occurs usually when a thread breaks but in some cases it occurs when there is some obstruction or other mishap which would cause a defect in the cloth unless the loom was stopped.

There are also filling stop motions butthis device has to do particularly with warp stop motions. In most looms, there is a fixed frame and also a lay which is pivoted down near the bottom of the fixed frame and which moves back and forth carrying the race plate, reed and the shut tle. This lay is caused to move back and forth by a crank shaft which usually includes two cranks which serve as pivots, each for one end of a crank arm, connecting rod, or pitman of which there are usually two, one crank arm being pivoted near each end of the lay.

The stopping devices as a whole are generally known as the shipper and consist of mechanism to disconnect the power, Whether it is a belt and pulley or an electric motor, from the loom. This is now usually done by a clutch. The shipper usually includes means to operate brake mechanism to stop the loom after the power has been disconnected.

The mechanism now used between the shipper and the sensitive warp thread feeling devices, such as drop wires, is complicated and is operated from the picking ball cam shaft or bottom shaft.

There are usually what are known as drop wires, one for each thread of the warp and each held up by that thread. When any thread which holds a wire breaks, its wire drops. In some cases, it drops in the path of a reciprocating member so that when this member strikes a drop wire, that reciprocating member through suitable connections, operates the shipper to stop the loom.

There are also drop wires which operate by means of an electric contact which, when a wire drops, closes a circuit which energizes a magnet or solenoid and causes it to move certain parts into the way of certain cam operable devices whereby the shipper is operated and the loom is stopped.

My invention is intended to utilize a crank arm of the lay as it moves back and forth to operate the shipper mechanism and I accomplish this by providing a knock off dagger preferably pivoted at one end to, and carried by, a swing lever pivoted to the frame and connected by a rod to the knock off lever or to some other part of the shipper or loom stopping mechanism.

The dagger is lifted, when a thread breaks, by means of a wire or rod operated by a solenoid, electric magnet or some other relatively weak device which, when it is energized by the closing of the electric circuit through a drop wire, will lift the dagger into the path of a bunter with a knock off plate. This bunter is so attached to the crank arm that the knock off plate, while it is moving forward, will engage the tip of the dagger and will force the dagger and its swing lever forward on its pivot and, through its connecting rod to the knock off lever of the shipper, will stop the loom. The connecting rod from the swing lever may engage any suitable part of the shipper or any mechanism to stop the loom.

I preferably attach the bunter to the crank arm on the side of the shipper handle and shipper mechanism and arrange the dagger so that as the crank arm revolves carrying the bunter with it, it ordinarily will clear the free end of the dagger but when the dagger is lifted by the action of a drop wire, it will come up to a position where the bunter will strike the end of the dagger and move the dagger and its swing lever with great power in a horizontal direction to operate the shipper and stop the loom.

The shipper or loom stopping devices might be on either or on both sides of the loom and my device could therefore be on either or both sides.

The principal advantages of my device are that it is very simple; there are no parts which are moving against other parts except when the loom is to be stopped; it can be set or adjusted very easily; and when once set requires no oiling and no attention; there is no strain on the sensitive feeling devices but when they act, the force to stop the loom is quick and powerful.

In the drawing, Fig. 1 is a side elevation with parts broken away of a loom with my attachment. Fig. 1A is a diagram showing one drop wire with one type of contacts.

Figs. 2, 3, and 4 are side elevations showing different positions of the dagger and bunter. Fig. 2 and Fig. 1 show the usual running position; Fig. 3 shows the dagger raised and the bunter engaging it and Fig. 4 shows the dagger and swing lever pushed forward and the bunter and dagger slipping away from each other.

Fig. 5 is a View similar to Fig. 3 modification of the bunter.

Fig. 6 is a diagram showing the path which a showing a bunter can be adjusted to follow and how it can be utilized to release it from the dagger.

Fig. 7 is a side elevation similar to Fig. 5 of a modification of the bunter.

Fig. 8 is a side elevation similar to Fig. 5 of a modification of the bunter and the dagger.

Fig. 9 is an isometric view of another modification of the bunter.

In the drawing, F represents the stationary frame of a loom and L the lay supported by and including swords such as I, I, pivoted at their lower ends to the bottom of the frame as at 2. C is a crank shaft which, as is customary, is made with two cranks, such as 3, each formed with a bearing 4 to each of which is journalled one end of a crank arm A. The other end of each crank arm A is pivoted as at 5 to one of the swords I or to some other part of the lay L.

The crank shaft C is revolved by any suitable power means P. This power means therefore operates the loom and causes the lay to move back and forth, all in the usual manner.

G indicates any shipper means or other means for stopping the loom and as shown includes a clutch I between power shaft II and the shaft III of the power means P, shown as a motor. Clutch 10 can be engaged or disengaged by means of the clutch rod 24. The foot pedal 22 pivoted at 13 is connected with the brake band I6 and is held in the position shown in Fig. 1 when the loom is running with the brake off by a spring latch I20 on brake upright shaft 23.

This latch I 20 can be released by the brake upright knock off arm I4, Fig. 3, pivoted at I14 on the loom frame and at II to one end of connecting rod I4 when the swing lever I2 is moved toward the front of the loom.

Pedal spring 8| is ordinarily under pressure while the loom is running and the brake is off but when latch I20 is released, it forces foot pedal 22 and its shaft 20 up, thus setting the brake. This shaft 20 also carries a diagonally disposed plate II which engages one arm '18 of the shipper handle 2I, or an extension thereof, in such a way that when plate 11 moves up, it releases arm 19 of a bell crank lever pivoted at I18 in such a way that the clutch rod 24 is forced back by clutch spring Si! so as to release the clutch fork member I80 thus disengaging clutch l6 and allowing the brake to stop the loom.

The above described parts are old and are now operated by complicated devices operable from a cam associated with the .picking ball cam shaft. I do away with all these devices in the following way.

S represents sensitive means which includes a plurality of warp thread dro-p wires 50, 50, each carried by a warp thread such as 5| and in such relation to contacts 52 and 51, insulated from each other at 58, that, when a thread breaks, its drop wire 50 drops and completes a circuit from the source of electric current 54 through conductors 28, 29, contacts 52 and 51, and a magnet or solenoid 55. When energized, this solenoid 55 moves an armature 56 which is attached to a dagger moving rod 60. This dagger moving rod 60 is connected to a dagger I0 forming part of dagger mechanism D.

This dagger moving rod 60 is preferably stiff enough so that it will not readily buckle. It is attached to the dagger II) at BI and at 62 is hung to a hook 63' carried by armature 56.

Preferably there are stops, 6 on hanger arm I2 and 68 on dagger I0, so that the dagger can drop by gravity but when lifted by rod 60 will as by means of slots 40, 40, and bolts 4|, 4|.

come to a stop at about a right angle with swing lever I2. These stops also limit the height to which solenoid 55 can lift dagger l0.

Dagger mechanism D includes dagger III pivoted at II to one end of a swing lever I2 which is pivoted at its other end I3 to the frame F, and includes a dagger connecting rod I4 which extends from the swing lever I2 to the knock off arm 14 of the loom stopping mechanism.

When dagger I0 is lifted by rod 60 and is pushed forward with lever I2 on pivot I3, it moves in an are as see dotted lines in Fig. 4.

B is a bunter which is attached to the crank arm A, and is preferably more or less adjustable At its free end bunter B is bent to form a knock off plate 44 which is in such a (position that as the crank shaft revolves and the crank arm is moved back and forth, plate 44 will move over the dagger III as shown in Fig. 2 but when the dagger I0 is raised by the dagger moving rod 60, the free end or tip I5 of the dagger II) will be lifted into the path of plate 44.

As crank arm A continues to move, bunter B and plate 44 will force the dagger I0, its pivot II, swing lever I2, connecting rod I4, knock off arm I4 and latch I20 so as to stop the loom.

Dagger ID and swing lever I2 must be of such length and bunter B must be of such size and so located that plate 44 will engage the dagger while it is moving forward as shown in Figs. 3 and 4 but so that the bottom of plate 44 will slip off the end of the dagger which is falling as the plate is rising. If desired, the parts can be of such size and the bunter can be 50 adjusted that, as shown diagrammatically in Fig. 6, the plate will start to recede after the movement of the dagger has stopped the loom.

Fig. 6 shows diagrammatically that the rising action of bunter B on dagger D would force the dagger up except for stops such as 61 or 68 or their equivalent.

Preferably contact is made when bunter B has passed bottom center and is going forward and up, as the tip I5 of the dagger is forced forward and down and the parts quickly disengage.

Another form of bunter is shown at M in Fig. 5. This has a knock off plate 30 to engage the dagg'er I0 and at its other end is held by clamp 3I carried by one of the rods I2 forming part of crank arm A, the two parts being adjustably and detachably connected together as by a bolt 34.

The face 33 of plate 30 is shown as formed on such a curve that it tends to counteract the lifting tendency as plate 30 moves up. I 4

In fact as shown in Fig. 8, the bunter 10 can be shaped like a dagger and the dagger II can be shaped like a bunter with a contact plate '15 to be engaged by bunter III. Bunter therefore means the member attached to the crank arm and dagger means the member attached to the swing lever. As shown, dagger 'II is pivoted to a swing lever 12 with a stop I3 and is lifted by a solenoid rod 14.

In Fig. 7 there is shown still another type of bunter N. This extends backward from a crank arm such as A and may be attached thereto as by slots 35 through which bolts 36 can be passed. It has at the back end a knock off plate 31 which is so arranged as to engage the end 38 of a relatively long dagger 39.

The bunter, dagger and knock off devices should be so arranged that when the knock off operates, the bunter and dagger will disengage in one of the ways described.

Fig. 9 shows a very simple type of bunter having a contact plate 18 and another arm 19 in which is a slot which permits the arm to be fastened on the member .A of the crank arm between it and a nut 11 on the rod 16 which is part of the crank arm. This construction does not allow much adjustment to and from the dagger I0 but turnbuckle 7 on rod l4 allows the dagger and swing lever to be adjusted to and from bunter 0.

Rods l2 and 16 form parts of crank arm A.

I claim:

1. The combination in a loom which includes a stationary frame, a lay supported by and including swords pivoted to the frame, a crank shaft with a crank arm connecting the crank shaft with the lay, power means for revolving the crank shaft to reciprocate the lay and to operate the loom, and shipper means for stopping the loom operable by a knock off arm; of sensitive dagger moving devices including a plurality of warp thread drop wires each wire being in an electric circuit passing through a solenoid, which solenoid moves an armature when a thread breaks; a swing lever pivoted to the frame; with dagger mechanism including a dagger carried by said swing lever pivoted to the frame, stops to limit the movement of the dagger on the swing lever, a connecting rod from the swing lever to the knock oif arm of the loom stopping mechanism and a dagger moving rod between the dagger and the armature of the solenoid; and an adjustable bunter including a knock off plate, the bunter being so attached to and located on the crank arm that its knock off plate will normally clear the free end of the dagger but will engage that end when the dagger is lifted by the dagger moving rod and so that as the plate moves with the crank arm it will so move the dagger, the swing lever and the knock off arm as to stop the loom.

2. The combination in a loom which includes a stationary frame, a lay supported by and including swords pivoted to the frame, a crank shaft with a crank arm connecting the crank shaft with the lay, power means for revolving the crank shaft to reciprocate the lay and to operate the loom, and shipper means for stopping the loom operable by a knock ofi arm; of sensitive dagger moving devices including a plurality of warp thread drop wires and means to move a dagger moving rod which is connected to a dagger when a thread breaks; a swing lever pivoted to the frame; a dagger mechanism including said dagger moving rod and such a dagger which is carried by said swing lever pivoted to the frame, and a connecting rod from the swing lever to the knock off arm of the loom stopping mechanism; and a bunter including a knock off plate, the bunter being so attached to and located on the crank arm that its knock off plate will normally clear the free end of the dagger but will engage that end when the dagger is lifted by the dagger moving rod and so that as the plate moves with the crank arm it will so move the dagger, the swing lever and the knock off arm as to stop the loom.

3. The combination in a loom which includes a stationary frame, a lay supported by and including swords pivoted to the frame, a crank shaft with a crank arm connecting the crank shaft with the lay, power means for revolving the crank shaft to reciprocate the lay and to operate the loom, and shipper means for stopping the loom operable by a knock off arm; of sensitive dagger moving devices including a plurality of warp thread drop wires each wire being in an electric circuit passing through a solenoid, which solenoid moves an armature when a thread breaks; a swing lever pivoted to the frame; with dagger mechanism including a dagger pivotally carried by said swing lever pivoted to the frame, stops to limit the movement of the dagger on the swing lever, a connecting rod from the swing lever to the knock off arm of the loom stopping mechanism and a dagger moving rod between the dagger and the armature of the solenoid.

4. The combination in a loom which includes a lay, a bunter member connected to and movable by a revoluble shaft, and electric warp feeler stop motion devices to activate a solenoid and to move its armature; with a dagger pivoted to a pivoted swing lever connected with the loom stopping devices; and a dagger moving rod between the armature and the dagger to move the free end of the dagger into the path of the bunter member when the feeler stop motion energizes the solenoid.

5. The combination in a loom which includes a frame, a lay and electric warp feeler stop motion devices including a solenoid with an armature; of a constantly movable bunter member; loom stopping devices including a shipper arm and cooperating brake members operable by the movement of a knock off arm; dagger mechanism including a swing lever having a dagger stop and pivoted to the frame, a connecting rod from the swing lever to the knock off arm and a dagger pivoted to the swing arm; and a connecting rod from the solenoid armature to the dagger, the bunter member normally moving without touching the end of the dagger.

6. The combination in a loom which includes a frame, a lay and electric warp feeler stop motion devices incluing a solenoid with an armature; of a constantly movable bunter member; loom stopping devices including a shipper arm and cooperating brake members operable by the movement of a knock off arm; dagger mechanism including a connecting rod to the knock ofi arm from a dagger pivotally connected thereto and supporting means for said connecting rod and dagger; and a dagger moving rod from the solenoid armature to the dagger, the bunter member normally moving without touching the end of the dagger.

JOSEPH STU ER. 

